quote:Of course it isn't merely guesswork, but you mistakenly include the word "facts" in your argument

No, I correctly included that word. "Facts" refers to observation and measurement that does not contradict the prediction of theory.

If you hadn't noticed before, notice now - I did not say theory was confirmed to be correct. I merely noted that the observed facts don't contradict it. And we do have lots of observations, more than enough to have reason to think we're onto something.